#include <stdio.h>

int main (void)
{
	int var = 300;
	//int *p = &var;
	int *p;
	p = &var;

	printf ("var = %d\n", *p);

#if 0
	p = (int *)0x300000000000;
	*p = 200;
	printf ("var = %d\n", *p);
#endif
	*p = 200;
	printf ("p = %p\n", p);
	printf ("*p = %d\n", *p);
	p = NULL;
	return 0;
}




